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WHEAT HEATER.

N0.24.7,640. Patented S ep t. 27,1881.

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.B. R. HAWLEY. WHEAT HEATER. No. 247,640. Patented Sept. 27,1881.

; U ITE STATES.

PATENT OFFICE.

BENJAMIN R. HAWLEY, OF CHICAGO, ILLINOIS, ASSIGNOR TO AGNES HAWLEY, OFSAME PLACE.

WHEAT-H EATER.

SPECIFICATION formingpart of Letters Patent No. 247,640, dated September27, 1881.

Application filed July 18, 1881.

To all whom it may concern:

Be it known that I, BENJAMIN B. HAWLEY, of Ohicago,Oook county, State ofIllinois, have invented certain new and useful Improvements inWheat-Heaters, of which the following is a specification.

This invention relates to the manner of heating wheat-heaters, and alsoto the construction of the heater itself, and will be understood fromthe drawings and the description given below.

Figure 1 shows a section of a wheat-heater and the heating apparatusused therewith constructed according to my present invention. Fig. 2shows a similar view of a modified form of the apparatus. Figs. 3 and 4are horizontal sections of the wheat-heater proper uponlines w a; and yy, respectively.

Wheat-heaters have usually been warmed, so far as my information goes,by steam or hot water passing through coils or passages in the heaterwhen the milling machinery is operated by steam This, perhaps, is asgood and cheap a method as has been devised; but where steam is notemployed for other purposes it necessitates expensive apparatus and aneedless consumption offuel.

My invention is equally effective, and can be placed in any mill at verysmall cost, and be operated much more cheaply than the other.

In said drawings, A represents a stove, which may be of any ordinaryconstruction, and of such dimensions as are requisite for the number ofheaters to be warmed by it. It is surrounded by a non-conduetin g case,A, with an air-space, A intervening upon all sides. The smoke passesout, as usual, through a pipe, A From the top of the air-space A arepassages B, leading upward into the wheatheaters O, and openingthereinto at such a point as will insure the discharge of the hot air tothe top of the heater. The warm air is thus conducted to the interior ofthe/heater, and it circulates through the same and around the taperingpipes 0, through which the wheat is fed, thereby warming the wheat tothe proper degree. After circulating through the heater the air falls asit cools through the pipe 1), opening from the bottom of the heater and(No model.)

leading to the bottom of the air-spaceA where it is rewarmed and againsent up to the wheat, thus traveling round and round continuouslythrough said air-space, the passages B, wheatheater 0, and return-pipesD. The wheat slowly descends through the flues 0, and issues thence intothe conductor E, by which it is carried to the burrs.

In the modified form shown in Fig. 2 the stove is utilized for heating apart of the mill, and the smoke is conducted into and through adrum, F,which is warmed thereby. Through this drum are air-flues f, affordingpassage to i the continuously-circulating air, which traverses similarup-air pipes B and return-pipes D between the drum and heater. Thelatter may be similar to the heaters alreadydescribed, or it may be lesscomplex in construction, with fewer grain-passages, as shown in thedrawings. The pipes B and D open from the top and into the bottom of thedrum, respectively, in the same manner as they lead from and into theairspace A in the other form of the invention.

This apparatus is not only much less costly to construct, but it lastsmuch longer than the steam, does not endanger the wheat through wettingby leaks, will not get outof order, and can be heated up in muchlesstime than the old apparatus.

In thedrawings I have used arrows to indicate the movement of the airand grain currents--viz., those with circles upon the shafts to indicatesmoke, the unfeathered ones for the warm rising air, and feathered oneswith X on the shaft for the cooled falling air, and the plain featheredones for the grain.

As drying of the berry is not desired, there is no communication betweenthe interior of the grain-fines and the air-space surrounding them, sothat the hot air is excluded from contact.

I claim- 1. The grain-heating apparatus described, consisting of aheater having flues through it open to the descending grain, anair-space surrounding such flues, but not communicating therewith, aconductor for carrying oft the grain, a stove for warming the air, anair-chamher surrounding" the stove, pipes adapted to conduct the airfrom said air-chamber to the air-space in the heater, and other pipes toreturn it from thence to the air-chamber, substantially as and for thepurpose set forth.

2. The grain-heater wherein are combined the pipes 0, running throughthe heater and forming passages for the grain, an air-space surroundingsaid grainpassages, but having no communication therewith, a conduit, B,for to discharging the warm air to the top of said space, and a conduit,1), to draw otf the air from the bottom of the same, substantially asand for the purpose specified.

B. R. HAWLEY. Witnesses:

T. EVERETT BROWN, H. M. MUNDAY.

